Sareh Ammari Allahyari, R. Saberi, K. Sepanloo
Aug 3, 2020
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Journal
Journal of Rare Earths
Abstract
Abstract Lanthanum is one of the rare earth metals which due to specific chemio–physical properties, has wide applications in different industries. In this research, the ability of the synthesized metal-organic framework (MOF), [Zn(bim)2(bdc)]n (ZBB) for the removal of lanthanum ions from the aqueous stream was investigated in the batch and column processes. The synthesized MOF was characterized by using scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET), Fourier transform infrared spectroscopy (FTIR), and Thermo gravimetric analysis (TGA) analysis. The effect of pH on lanthanum ions adsorption was evaluated in the range from 1 to 7. Moreover, isothermal, kinetic, and thermodynamic parameters for adsorption of La(III) ions onto the synthesized MOF were evaluated. The adsorption capacity of lanthanum ions onto the synthesized MOF was calculated by about 130 mg/g. Thermodynamic studies demonstrated the endothermic and chemical nature of Lanthanum adsorption, while kinetic studies suggested the pseudo-first-order of reaction. In column mode, the effect of solution flow rate passing through the fixed-bed was studied. Experimental data confirmed that increasing the bed flow rate causes a decrease in the adsorption capacity of lanthanum ions on the synthesized MOF.